Growth and survival of Pinus taeda in response to surface and subsurface tillage in the southeastern United States

Weed control trials were conducted on loblolly pine (Pinus taedaL.) or slash pine (Pinus elliottiiEngelm.) seedbeds at 12 locations in the southeastern United States. Good weed control was obtained from 2,4-bis-(isopropylamino)-6-(methylthio)-s-triazine (prometryne) at 2.2 and 4.5 kg/ha;N,N-dimethyl-2,2-diphenylacetamide (diphenamid) at 4.5 and 9 kg/ha; α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) at 1.1 and 2.2 kg/ha; and 2-ethylthio-4,6-bis-isopropylamino-s-triazine (GS-16068) at 2.2 and 4.5 kg/ha as preemergence applications immediately followed by irrigation. Diphenamid and trifluralin treatments were not injurious to either pine species at either rate. GS-16068 was only slightly injurious at the high rate at one location. Prometryne was injurious at two locations at the high rate and at one location at the low rate.

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Vegetation control and fertilization in midrotation Pinus taeda stands in the southeastern United States

Annals of Forest Science ◽

10.1051/forest:2003054 ◽

2003 ◽

Vol 60 (7) ◽

pp. 619-624 ◽

Cited By ~ 16

Author(s):

Timothy J. Albaugh ◽

H. Lee Allen ◽

Bruce R. Zutter ◽

Harold E. Quicke

Keyword(s):

United States ◽

Pinus Taeda ◽

Southeastern United States ◽

Vegetation Control

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Soil change and loblolly pine (Pinus taeda) seedling growth following site preparation tillage in the Upper Coastal Plain of the southeastern United States

Forest Ecology and Management ◽

10.1016/j.foreco.2007.01.069 ◽

2007 ◽

Vol 242 (2-3) ◽

pp. 558-568 ◽

Cited By ~ 11

Author(s):

M. Chad Lincoln ◽

Rodney E. Will ◽

Lawrence A. Morris ◽

Emily A. Carter ◽

Daniel Markewitz ◽

...

Keyword(s):

United States ◽

Pinus Taeda ◽

Seedling Growth ◽

Loblolly Pine ◽

Coastal Plain ◽

Southeastern United States ◽

Site Preparation

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Habitat specific trade-offs in growth and survival by hogfish Lachnolaimus maximus in southeast Florida

Bulletin of Marine Science ◽

10.5343/bms.2020.0075 ◽

2021 ◽

Author(s):

Ian A Towne ◽

Paul T Arena ◽

Angela B Collins ◽

David W Kerstetter

Keyword(s):

United States ◽

Southeastern United States ◽

Age And Growth ◽

Fishing Pressure ◽

Growth And Survival ◽

Trade Offs ◽

Eastern Gulf Of Mexico ◽

Average Maximum ◽

Reef Tract ◽

Different Depths

The hogfish Lachnolaimus maximus, an economically important, reef-associated protogynous teleost, has gained additional interest from fisheries managers due to evidence of overfishing in the southeastern United States. This study collected data on age and growth of hogfish in southeast Florida (SEFL), an understudied part of the species’ range. Hogfish (n = 227) were collected from three reef tracts at different depths between January 2016 and August 2017. The average maximum potential length (L∞) was 414 mm overall and showed evidence of Lee’s Phenomenon occurring relative to the eastern Gulf of Mexico, an area of presumed lower fishing pressure, where L∞ was 920 mm. Hogfish growth was also found to vary significantly by reef location in SEFL. Otolith-based aging revealed that SEFL hogfish growth past age 3 significantly decreased as reef depth increased between the three reef tracts [length at age 9 (L9) = 564, 405, 351 mm FL]. By L9, hogfish from the shallowest reef tract (4–6 m) were on average 61% longer and four times the weight of individuals collected from the deepest reef tract (15–25 m). Annual survival also increased with depth (42%, 65%, 73%), with a linear relationship to growth at L9 where R2 = 1.0, indicating there are inherent trade-offs between growth and longevity in hogfish of southeast Florida.

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Validation of an Integrated Estimation of Loblolly Pine (Pinus taeda L.) Leaf Area Index (LAI) Using Two Indirect Optical Methods in the Southeastern United States

Southern Journal of Applied Forestry ◽

10.1093/sjaf/32.3.101 ◽

2008 ◽

Vol 32 (3) ◽

pp. 101-110 ◽

Cited By ~ 11

Author(s):

John S. Iiames ◽

Russell Congalton ◽

Andrew Pilant ◽

Timothy Lewis

Keyword(s):

United States ◽

Leaf Area Index ◽

Leaf Area ◽

Pinus Taeda ◽

Loblolly Pine ◽

Southeastern United States ◽

Area Ratio ◽

Allometric Equations ◽

Area Index ◽

Whole Tree

Abstract Quality assessment of satellite-derived leaf area index (LAI) products requires appropriate ground measurements for validation. Since the National Aeronautics and Space Administration launch of Terra (1999) and Aqua (2001), 1-km, 8-day composited retrievals of LAI have been produced for six biome classes worldwide. The evergreen needle leaf biome has been examined at numerous validation sites, but the dominant commercial species in the southeastern United States, loblolly pine (Pinus taeda), has not been investigated. The objective of this research was to evaluate an in situ optical LAI estimation technique combining measurements from the Tracing Radiation and Architecture of Canopies (TRAC) optical sensor and digital hemispherical photography (DHP) in the southeastern US P.taeda forests. Stand-level LAI estimated from allometric regression equations developed from whole-tree harvest data were compared to TRAC–DHP optical LAI estimates at a study site located in the North Carolina Sandhills Region. Within-shoot clumping, (i.e., the needle-to-shoot area ratio [γE]) was estimated at 1.21 and fell within the range of previously reported values for coniferous species (1.2–2.1). The woody-to-total area ratio (α = 0.31) was within the range of other published results (0.11–0.34). Overall, the indirect optical TRAC–DHP method of determining LAI was similar to LAI estimates that had been derived from allometric equations from whole-tree harvests. The TRAC–DHP yielded a value 0.14 LAI units below that retrieved from stand-level whole-tree harvest allometric equations. DHP alone yielded the best LAI estimate, a 0.04 LAI unit differential compared with the same allometrically derived LAI.

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Pollination Bag Type Has a Significant Impact on Cone Survival in Mass Production of Controlled Pollinated Seeds in Loblolly Pine

Forest Science ◽

10.1093/forsci/fxaa013 ◽

2020 ◽

Vol 66 (5) ◽

pp. 589-599

Author(s):

Austin J Heine ◽

Trevor D Walker ◽

Steven E McKeand ◽

Jackson B Jett ◽

Fikret Isik

Keyword(s):

United States ◽

Pinus Taeda ◽

Loblolly Pine ◽

Mass Production ◽

Southeastern United States ◽

Seed Orchard ◽

Kraft Paper ◽

Industry Standard ◽

Sib Families ◽

Pinus Taeda L

Abstract Since 2009, deployment of full-sib families of loblolly pine (Pinus taeda L.) has gained prominence in the southeastern United States. To produce full-sib seed, a pollination bag is used to isolate female strobili from outside pollen contamination, and a known pollen is applied at the time of maximum female strobilus receptivity. The goal of this study was to compare prototype pollination bags made by PBS International to the industry standard kraft paper pollination bag with and without a support wire for female strobili survival and to assess their efficiency for mass production of controlled cross loblolly pine seed. A multiyear study compared 13 pollination bag types at more than nine seed orchard sites across the southeastern United States. There were significant differences among bag types for conelet survival at the time of bag removal that persisted until cone harvest 18 months later. Female strobili bagged in prototype PBS-I2 were over three times more likely to survive to cone harvest than strobili inside the traditional kraft pollination bag. Two of the PBS bag types had the highest estimated filled seed per bag. One PBS bag was faster to install and remove than the kraft paper bag with a support wire.

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